package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.constants.WemediaConstants;
import com.heima.common.constants.WmNewsMessageConstants;
import com.heima.common.exception.CustomException;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.WmNewsDto;
import com.heima.model.wemedia.dtos.WmNewsPageReqDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import com.heima.wemedia.service.WmNewsService;
import com.heima.wemedia.service.WmNewsTaskService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.*;
import java.util.stream.Collectors;

@Slf4j
@Service
@Transactional
public class WmNewsServiceImpl extends ServiceImpl<WmNewsMapper, WmNews> implements WmNewsService {

    @Autowired
    private WmNewsMaterialMapper wmNewsMaterialMapper;
    @Autowired
    private WmMaterialMapper wmMaterialMapper;
    @Autowired
    private WmNewsAutoScanService wmNewsAutoScanService;
    @Autowired
    private WmNewsTaskService wmNewsTaskService;

    /**
     * 条件查询文章列表
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findList(WmNewsPageReqDto dto) {
        // 1 检查参数
        // 2 分页检查
        dto.checkParam();

        // 3 分页的条件查询
        IPage<WmNews> page = new Page<>(dto.getPage(),dto.getSize());
        LambdaQueryWrapper<WmNews> lambdaQueryWrapper = new LambdaQueryWrapper();
        lambdaQueryWrapper
                // 状态精确查询
                .eq(dto.getStatus() != null,WmNews::getStatus,dto.getStatus())
                // 频道精确查询
                .eq(dto.getChannelId() != null,WmNews::getChannelId,dto.getChannelId())
                // 时间范围查询
//                .ge(dto.getBeginPubDate() != null ,WmNews::getCreatedTime,dto.getBeginPubDate())
//                .le(dto.getEndPubDate() != null,WmNews::getCreatedTime,dto.getEndPubDate())
                .between(dto.getBeginPubDate() != null && dto.getEndPubDate() != null, WmNews::getCreatedTime,dto.getBeginPubDate(), dto.getEndPubDate())
                // 关键字的模糊查询
                .like(StringUtils.isNotBlank(dto.getKeyword()),WmNews::getTitle,dto.getKeyword())
                // 查询当前登录人的文章
                .eq(WmNews::getUserId, WmThreadLocalUtil.getUser().getId())
                // 按照发布时间倒序查询
                .orderByDesc(WmNews::getCreatedTime);

        page(page,lambdaQueryWrapper);

        // 4 结果返回
        ResponseResult responseResult = new PageResponseResult(dto.getPage(),dto.getSize(), (int) page.getTotal());
        responseResult.setData(page.getRecords());
        return responseResult;
    }

    /**
     * 发布文章或保存草稿
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult submitNews(WmNewsDto dto) {
        // 0.条件判断
        if (dto == null || dto.getContent() == null)
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);

        // 1.保存或修改文章
        WmNews wmNews = new WmNews();
        // 拷贝属性 属性名称和类型相同才能拷贝
        BeanUtils.copyProperties(dto,wmNews);
        // 将dto里保存image的list 转换成为 wmNews里的String
        if (dto.getImages() != null && dto.getImages().size() > 0){
            String imageStr = org.apache.commons.lang3.StringUtils.join(dto.getImages(),",");
            wmNews.setImages(imageStr);
        }
        // 如果当前封面类型为自动 -1
        if (dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO))
            dto.setImages(null);

        saveOrUpdateWmNews(wmNews);
        // 2.判断是否为草稿，如果是草稿结束当前方法
        if (dto.getStatus().equals(WmNews.Status.NORMAL.getCode())) {
            return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
        }
        // 3.不是草稿，保存文章与素材的关系
        // 获取到文章类容中的图片信息
        List<String> materials = ectractUrlInfo(dto.getContent());
        savaRelativeInfoForContent(materials,wmNews.getId());

        // 4.不是草稿，保存文章封面与素材关系，如果当前布局是自动的，需要匹配封面图片
        savaRelativeInfoForCover(dto,wmNews,materials);

        // 异步调用审核
        //wmNewsAutoScanService.autoScanWmNews(wmNews.getId());
        wmNewsTaskService.addNewsToTask(wmNews.getId(),wmNews.getPublishTime());

        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }


    /**
     * 第一个功能：如果当前封面类型为自动，则设置封面类型的数据
     * 匹配规则：
     * 1.如果内容图片大于等于1，小于3 单图 type 1
     * 2.如果内容图片大于等于三，多图 type 3
     * 3.如果内容没有图片 无图 type 0
     *
     * 第二个功能：保存封面图片与素材的关系
     * @param dto
     * @param wmNews
     * @param materials
     */
    private void savaRelativeInfoForCover(WmNewsDto dto, WmNews wmNews, List<String> materials) {
        List<String> images = dto.getImages();
        //如果当前封面类型为自动，则设置封面类型的数据
        if (dto.getType().equals(WemediaConstants.WM_NEWS_TYPE_AUTO)){
            // 多图
            if(materials.size() >= 3){
                wmNews.setType(WemediaConstants.WM_NEWS_MANY_IMAGE);
                images = materials.stream().limit(3).collect(Collectors.toList());
            }else if (materials.size() >= 1 && materials.size() < 3){
                // 单图
                wmNews.setType(WemediaConstants.WM_NEWS_SINGLE_IMAGE);
                images = materials.stream().limit(1).collect(Collectors.toList());
            }else {
                // 无图
                wmNews.setType(WemediaConstants.WM_NEWS_NONE_IMAGE);
            }

            // 修改文章
            if (images !=null && images.size() > 0){
                wmNews.setImages(org.apache.commons.lang3.StringUtils.join(images,","));
            }
            updateById(wmNews);
        }

        // 第二个功能：保存封面图片与素材的关系
        if (images !=null && images.size() > 0){
            saveRelativeInfo(images,wmNews.getId(),WemediaConstants.WM_CONTENT_REFERENCE);
        }
    }

    /**
     *处理文章类容图片与素材关系
     * @param materials
     * @param newsId
     */
    private void savaRelativeInfoForContent(List<String> materials, Integer newsId) {
        saveRelativeInfo(materials,newsId,WemediaConstants.WM_CONTENT_REFERENCE);
    }

    /**
     * 保存文章图片与素材的关系到数据库中
     * @param materials
     * @param newsId
     * @param type
     */
    private void saveRelativeInfo(List<String> materials, Integer newsId, Short type) {
        if (materials != null && !materials.isEmpty()){
            //通过图片的Url查到素材的id
            List<WmMaterial> dbMaterials = wmMaterialMapper.selectList(Wrappers.<WmMaterial>lambdaQuery().in(WmMaterial::getUrl, materials));

            // 判断素材是否有效
            if (dbMaterials == null || dbMaterials.size() == 0)
                // 手动抛出异常 第一个功能：能提示调用者素材失效了   第二个功能：进行数据的回滚
                throw new CustomException(AppHttpCodeEnum.MATERIAL_REFERENCE_FAIL);
            if (materials.size() != dbMaterials.size())
                throw new CustomException(AppHttpCodeEnum.MATERIAL_REFERENCE_FAIL);

            //用stream流收集id
            List<Integer> idList = dbMaterials.stream().map(WmMaterial::getId).collect(Collectors.toList());
            //批量保存
            wmNewsMaterialMapper.saveRelations(idList,newsId,type);
        }
    }


    /**
     * 提取文章内容中的图片信息
     * @param content
     * @return
     */
    private List<String> ectractUrlInfo(String content) {
        List<String> materials = new ArrayList<>();
        List<Map> maps = JSON.parseArray(content, Map.class);
        for (Map map : maps) {
            if (map.get("type").equals("image")){
                String imgUrl = (String) map.get("value");
                materials.add(imgUrl);
            };
        }
        return materials;
    }

    /**
     * 保存或修改文章
     * @param wmNews
     */
    private void saveOrUpdateWmNews(WmNews wmNews) {
        // 补全属性
        wmNews.setUserId(WmThreadLocalUtil.getUser().getId());
        wmNews.setCreatedTime(new Date());
        wmNews.setSubmitedTime(new Date());
        wmNews.setEnable((short)1);//默认是上架

        if (wmNews.getId() == null){
            // 保存
             save(wmNews);
        }else {
            // 修改
            // 删除文章图片与素材的关系
            wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery().eq(WmNewsMaterial::getNewsId,wmNews.getId()));
            updateById(wmNews);
        }
    }


    @Autowired
    private KafkaTemplate<String,String> kafkaTemplate;
    /**
     * 文章的上下架
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult downOrUp(WmNewsDto dto) {
        // 1.检查参数
        if (dto.getId()==null)
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);

        // 2.查询文章
        WmNews wmNews = getById(dto.getId());
        if (wmNews==null)
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"文章不存在了");

        // 3.判断文章是否已发布
        if (!wmNews.getStatus().equals(WmNews.Status.PUBLISHED.getCode()))
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"当前文章不是发布状态，不能上下架");

        // 4.修改文章enable
        if(dto.getEnable()!=null && dto.getEnable()>-1 && dto.getEnable()<2){
            update(Wrappers.<WmNews>lambdaUpdate()
                    .set(WmNews::getEnable,dto.getEnable())
                    .eq(WmNews::getId,wmNews.getId()));

            if (wmNews.getArticleId() != null){
                // kafka 发送消息，通知article修改文章的配置
                Map<String,Object> map = new HashMap<>();
                map.put("articleId",wmNews.getArticleId());
                map.put("enable",dto.getEnable());
                kafkaTemplate.send(WmNewsMessageConstants.WM_NEWS_UP_OR_DOWN_TOPIC,JSON.toJSONString(map));
            }

        }
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }
}
